18. Read the passage carefully. Choose the best option A, B, C or D for space
Accident can happen in any places and at any time, so you should be careful to
avoid them. First of all, you should not play _______________ (18) a sharp tool
like a knife or a pair _______________ (19) scissors. Second, you should not
touch animals on the street _______________ (20) they may bite or scratch you.
When you are _______________ (21) a bike or a motorbike, you should
_______________ (22) a helmet. If an accident happens, call for help.
A. with B. to
C. on D. from
18 with
19 of
20 because
21 on
22 wear
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